import store from '@/store'
import config from '@/config'
import { getToken } from '@/utils/auth'
import errorCode from '@/utils/errorCode'
import { toast, showConfirm, tansParams } from '@/utils/common'
import { RequestConfig, ResponseData } from '@/types/request'
import { encrypt, decrypt } from '@/utils/jsencrypt';
import { encryptBase64, encryptWithAes, generateAesKey, decryptWithAes, decryptBase64 } from '@/utils/crypto';

let timeout = 10000
const encryptHeader = 'encrypt-key';
const baseUrl = config.baseUrl
const clientId = config.clientID;
const request = <T>(config : RequestConfig) : Promise<ResponseData<T>> => {
	// 是否需要设置 token
	const isToken = (config.headers || {}).isToken === false
	const isEncrypt = (config.headers || {}).isEncrypt === true;

	config.header = config.header || {}
	if (getToken() && !isToken) {
		config.header['Authorization'] = 'Bearer ' + getToken(),
			config.header['clientid'] = clientId
	}
	//console.log("config.baseUrl:"+config.baseUrl)
	//console.log("config.method:"+config.method);
	// 当开启参数加密
	if (isEncrypt && (config.method?.toLowerCase() === 'post' || config.method?.toLowerCase() === 'put')) {
		// 生成一个 AES 密钥
		const aesKey = generateAesKey();
		console.log("aesKey:" + aesKey);
		config.header[encryptHeader] = encrypt(encryptBase64(aesKey));
		console.log("encryptHeader:" + config.header[encryptHeader]);
		config.data = typeof config.data === 'object' ? encryptWithAes(JSON.stringify(config.data), aesKey) : encryptWithAes(config.data, aesKey);
	}
	// get请求映射params参数
	if (config.params) {
		let url = config.url + '?' + tansParams(config.params)
		url = url.slice(0, -1)
		config.url = url
	}
	return new Promise((resolve, reject) => {
		uni.request({
			method: config.method || 'GET',
			timeout: config.timeout || timeout,
			url: config.baseUrl || baseUrl + config.url,
			data: config.data,
			header: config.header,
			dataType: 'json'
		}).then(response => {
			/* let [error, res] = response
			 if (error) {
			   toast('后端接口连接异常')
			   reject('后端接口连接异常')
			   return
			 } */
			const res = response
			// 加密后的 AES 秘钥
			const keyStr = res.header[encryptHeader];
			// 加密
			if (keyStr != null && keyStr != '') {
				const encrData = JSON.stringify(res.data);
				// 请求体 AES 解密
				const base64Str = decrypt(keyStr);
				// base64 解码 得到请求头的 AES 秘钥
				const aesKey = decryptBase64(base64Str.toString());
				// aesKey 解码 data
				const decryptData = decryptWithAes(encrData, aesKey);
				// 将结果 (得到的是 JSON 字符串) 转为 JSON
				res.data = JSON.parse(decryptData);
			}
			const data : ResponseData<T> = res.data as ResponseData<T>
			const code = data.code || 200
			// @ts-ignore
			const msg : string = errorCode[code] || data.msg || errorCode['default']
			if (code === 401) {
				const hasConfirm = uni.getStorageSync('hasConfirm') || false

				if (!hasConfirm) {
					uni.setStorageSync('hasConfirm', true);
					showConfirm('当前登录状态已过期，请重新登录。').then(res => {
						uni.setStorageSync('hasConfirm', false);
						if (res.confirm) {
							store.dispatch('LogOut').then(res => {
								uni.reLaunch({ url: '/pages/login' })
							})
						}
					})
				}

				reject('无效的会话，或者会话已过期，请重新登录。')
			} else if (code === 500) {
				toast(msg)
				reject('500')
			} else if (code !== 200) {
				toast(msg)
				reject(code)
			}
			resolve(data)
		})
			.catch(error => {
				let { message } = error
				if (message === 'Network Error') {
					message = '后端接口连接异常'
				} else if (message.includes('timeout')) {
					message = '系统接口请求超时'
				} else if (message.includes('Request failed with status code')) {
					message = '系统接口' + message.substr(message.length - 3) + '异常'
				}
				toast(message)
				reject(error)
			})
	})
}

export default request